Bullseye Marigold Yellow Frit (style 000320) is 90 COE fusible frit, crushed glass in graded grain sizes for layering, shading, and decorative surface work. As a striking color, it may not reach its final shade until it is fired.
Cold characteristics Bullseye writes these notes for the sheet form of this color; the same glass is used to make this product.
May appear partly transparent with wide variations in color density. Overall look of a lighter, brighter yellow such as Canary Yellow Opalescent (000120).
Working notes Matures to an opaque marigold yellow. May appear slightly dappled. This style is not suitable for kilncasting because it can become incompatible when held at high temperatures for an extended period. It may also become incompatible in instances where processes exceed the parameters of the test for compatibility. Testing recommended when heatwork exceeds these parameters.
Reactions This is a reactive glass. It contains Sulfur (S) / Selenium (Se) and may react where it meets Copper (Cu), Lead (Pb), and Silver (Ag), forming a visible line or halo at the boundary. Use that on purpose to outline and add depth, or keep reactive colors apart to avoid it.
Using the frit Bullseye frit is sold in grain sizes from powder to coarse. Powder gives soft, even color and shading, fine and medium build controlled texture and coverage, and coarse gives bold flecks of color and fills for casting and pattern bars. Choose the grain by the effect you want and the fired thickness of your piece.
Fusing and compatibility Tested compatible with other Bullseye glass. When you combine it with glass from other makers, matching COE alone does not guarantee compatibility, so fire a small test tile first.
More of This Color The same Bullseye color in other forms: 3mm Sheet · 2mm Thin Sheet .
Helpful downloads What to Expect from Bullseye Glass (PDF) · Reactive Potential of Bullseye Glass (PDF)
Technical data courtesy of Bullseye Glass.
Description updated: July 7, 2026
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